David Luiz was sent off as ten-man Chelsea were held at Stamford Bridge by Arsenal for the first time in six years.

The Brazil centre-back was shown am 89th-minute straight red by referee Michael Oliver, for his high challenge on Gunners’ left-back Sead Kolasinac.

It sparked angry scenes on the touchline with Carlo Cudicini, assistant to Antonio Conte, involved in a furious row with the Arsenal bench.

It also means Chelsea have now had as many reds in their last five Premier League games as they have had in their 73 games combined beforehand (three).

Earlier former Chelsea keeper Petr Cech pulled off an outstanding save to deny Pedro with the Spain winger clean through.

Aaron Ramsey blew Arsenal’s best chance when he ghosted past two players into the Blues box, only to hit the post.

1. A solution for Arsenal

Arsenal appear to have worked out Chelsea (Image: REX/Shutterstock)

It would appear Arsenal have finally worked out the way to cope with the Champions.

Victorious against the odds in the FA Cup Final, they followed up in pre-season and again (albeit on penalties) in the Community Shield.

With Premier League points at stake and Arsenal seemingly in turmoil, however, this was a truer test of whether that shock FA Cup win was a fluke. It wasn’t. Arsenal were impressive today, you have to hand it to them. They started superbly with Welbeck, Lacazette and Kolasinac all leaving few hearts in mouths around Stamford Bridge. Yes, Cech pulled off a quite stunning stop to deny Pedro with the Spaniard clean through but Ramsey hit the post after slicing through the Blues defence in a quite magnificent move.

Their record against the top clubs might well be poor but Arsenal no longer have nightmares about coping with Chelsea.

2. Bakayoko is an upgrade

Bakayoko performed well (Image: Darren Walsh)

On in the second half for Pedro who needed treatment for a knee injury during the first. Considering the immediate menace he gave to the team alongside Kante, it was a surprise that Conte did not start the former Monaco midfielder.

In a second-half moment that summed him up, Bakayoko caught Aaron Ramsey in possession, wrestled away from Welshman, side-stepped two more Arsenal players and then brought the ball forward to start a Chelsea attack. Nemanja Matic was clearly an outstanding servant for the club, helping them to title and European success.

But, despite claims to the contrary, Bakayoko - at six years younger and more mobile - is an upgrade.

3. Cech delivers the goods

Cech was back on his former stomping ground (Image: AFP)

Back at the club where remains a legend Petr Cech was clearly focused and motivated. His magnificent stop, to deny Pedro with the Spaniard clean through and looking certain to score, was vintage Cech.

He was given a warm reception by the home fans and rightly so. Late in the second half when Hazard pulled back his right foot on the edge of the box, it looked as though the Belgian would finally beat the old stager.

But up against Thibaut Courtois, the man who unseated him from his position as Chelsea’s undisputed no.1, Cech was in no mood to allow that to happen.

4. Lacazette is a curious one

Lacazette fires the ball over (Image: REX/Shutterstock)

Curious one this. Why would Wenger buy a £44million striker and use him (or not, as the case may be) in the way that he does Lacazette?

Surely you deploy a man with his record and his hammer of a left foot in the big games against the big teams, especially with Arsenal’s poor record against to big five.

Instead he didn’t start at Liverpool and he was sacrificed here at Chelsea in favour of Alexis Sanchez.

As always, Wenger will have his reasons but fans will want to know. So too will Lacazette.

5. Sanchez remains popular

Sanchez came off the bench in the second half (Image: REUTERS/Getty Images)

His own fans booed him against Bournemouth after his open admission that he wanted out during the summer.

The hardcore here, however, had no such issues, chanting his name throughout and calling for him to be brought on during the second half.

He joked with them as he warmed up and they lapped it up. As we are seeing with the likes of Virgil van Dijk and Coutinho, it’s a bit like staying together for the kids. The kids are loving it.